What does Genesis 35:8 mean?
Deborah was the nurse who travelled with Rebekah, Jacob's mother, when she met Isaac (Genesis 24:59). Rebekah is the one who urged Jacob to deceive his father Isaac to steal the family blessing (Genesis 27:14–17). When Rebekah's nurse died, she was buried beneath an oak tree in Bethel. This tree was given a name meaning "the oak of weeping." The inclusion of this detail, in this part of Scripture, raises some natural questions.Taken as part of the natural flow of the story, this comment implies that Rebekah's nurse has been traveling with Jacob for some time. Rebekah has not been mentioned since shortly after Jacob left home (Genesis 27:46). She won't be brought up again until Joseph asks to be buried alongside her and other ancestors (Genesis 49:31). It's very likely Rebekah died while Jacob was in exile. Perhaps Deborah joined Jacob's family when he reunited with Esau (Genesis 33:4).
Another likely explanation is that this verse is a footnote. In other words, this fact is being included simply because Deborah was buried near the place now being discussed: Bethel. Scripture gives no other details, so we can't say for sure what happened. Her death might have occurred then, or earlier, or later.